Table 3-1. Battery Connector M101; Table 3-2. Vocon Connector J1001 - Motorola APX 5000 Service Manual

Theory of Operation: Transceiver Board
3.1.1 Interconnections
This section describes the various interconnections for the transceiver board.
3.1.1.1 Battery Connector M101
Battery connector M101 solders to the transceiver printed circuit board. The connector has 5 gold
plated contacts that mate with the battery, two contacts for positive, two for negative and one for the
Dig_Battery_Data. Signal descriptions are in
Pin No.
1
2
3
3.1.1.2 VOCON Connector J1001
VOCON connector J1001 is a 40 pin board to board connector that connects to XCVR board
connector P101. This is a digital interface carrying DC power, control, and data between the XCVR
and VOCON boards.
Table 3-2 lists the connector pins, their signals, and functions. SPI refers to serial peripheral
interface, which is the control bus from the microprocessor. SSI is the serial synchronous interface
bus for data to and from the DSP. There is a RX SSI bus for demodulated data from the receiver and
a TX SSI bus for modulation data to the transmitter.
Pin
VOCON Signal
No.
1 GROUND
2 EEPROM_SPI_CS
3 16.8_MHZ_SINEWAVE
4 GROUND
5 GROUND
6 V_EXT_1.85
7 RF_BRD_RSTB
8 V_2.8_RF
9 DMCS
10 F2_PARAMP
11 RX_FSYNC

Table 3-1. Battery Connector M101

Signal Description
DC_BATT Battery positive terminal, nominally 7.5 Vdc
Dig_Battery_Data Battery status, from battery to VOCON
Ground Battery negative terminal, tied to PCB ground

Table 3-2. VOCON Connector J1001

XCVR Signal
GROUND
DIG_CTRL_SPI_EEPROM_PE
CLK_16_8MHZ
GROUND
GROUND
DC_LIN_1_875_D
DIG_CTRL_RSTB
DC_LIN_2_775V
DIG_CTRL_SSI_TRIGGER
DIG_CTRL_IO49
DIG_DATA_SSI_RX_FS
Table 3-1.
XCVR
I/O
–
I
O
–
–
I
I/O control
I
I
I control
O
Type Description
– –
spi SPI EEprom chip select
rf 16.8 MHz reference clock
– –
– –
dc Regulated 1.85 V
Reset
dc Regulated 2.775 V
ssi SSI Trigger
TX Slot enable
ssi RX SSI frame sync
3-5